2443221 has 48 divisors (see below), whose sum is σ = 4268160. Its totient is φ = 1330560.

The previous prime is 2443219. The next prime is 2443241. The reversal of 2443221 is 1223442.

2443221 is a `hidden beast` number, since 2 + 443 + 221 = 666.

It is not a de Polignac number, because 2443221 - 2¹ = 2443219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2443194 and 2443203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66015 + ... + 66051.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2^2443221 is an apocalyptic number.

It is an amenable number.

2443221 is a deficient number, since it is larger than the sum of its proper divisors (1824939).

2443221 is a wasteful number, since it uses less digits than its factorization.

2443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 103 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 2443221 is about 1563.0806121247. The cubic root of 2443221 is about 134.6855231522.

Adding to 2443221 its reverse (1223442), we get a palindrome (3666663).

The spelling of 2443221 in words is "two million, four hundred forty-three thousand, two hundred twenty-one".